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// MUD Programming 
// Ron Penton 
// (C)2003 
// Demo03-03.cpp - Mutexes 
// This program runs three threads, one which manages two child threads,  
// and two child threads that alternate printing a letter. 
 
 
#include  
using namespace std; 
 
#include "ThreadLib/ThreadLib.h" 
 
ThreadLib::Mutex m; 
 
void PrintThread( void* data ) 
{ 
    // convert the data passed in into a character. 
    char c = (int)data; 
 
    for( int i = 0; i < 200; i++ ) 
    { 
        m.Lock(); 
        for( int j = 0; j < 50; j++ ) 
        { 
            cout << c; 
            cout.flush(); 
        } 
        m.Unlock(); 
    } 
} 
 
 
int main() 
{ 
    ThreadLib::ThreadID a, b; 
 
    a = ThreadLib::Create( PrintThread, (void*)'a' ); 
    b = ThreadLib::Create( PrintThread, (void*)'b' ); 
 
 
    ThreadLib::WaitForFinish( b ); 
    ThreadLib::WaitForFinish( a ); 
 
    char c; 
    cin >> c; 
 
    return 0; 
}